Is AD 2004-10-01 a recurring Airworthiness Directive?

No — AD 2004-10-01 is a one-time directive. Verify it was complied with in the aircraft's records.

Which aircraft does AD 2004-10-01 apply to?

AD 2004-10-01 applies to Pratt & Whitney — models JT9D-3A, JT9D-7, JT9D-7A, JT9D-7AH, JT9D-7H, JT9D-7F, JT9D-7J, JT9D-20. Serial/part conditions may narrow it to specific aircraft.

Airworthiness Directive 2004-10-01

one-time

Official AD 2004-10-01 · FR doc 04-10428 · 2004-05-11 · turbine engine

Airworthiness Directives; Pratt & Whitney JT9D-3A, -7, -7A, -7AH, -7H, -7F, -7J, -20, and -20J Turbofan Engines

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for Pratt & Whitney (PW) JT9D-3A, -7, -7A, -7AH, -7H, -7F, -7J, -20, and - 20J turbofan engines. This AD clarifies a life limit for certain part numbers of 6th stage low pressure turbine (LPT) air seals, and requires their removal from service before accumulating 15,000 cycles-since-new (CSN). This AD results from reports of certain 6th stage LPT air seals possibly not being life tracked due to confusion from updates to the engine manuals. We are issuing this AD to prevent failure of the 6th stage LPT air seal, which could cause LPT damage resulting in an uncontained engine failure.

Which aircraft AD 2004-10-01 applies to

MakesPratt & Whitney

ModelsJT9D-3A, JT9D-7, JT9D-7A, JT9D-7AH, JT9D-7H, JT9D-7F, JT9D-7J, JT9D-20, JT9D-20J, JT9D

These engines are installed on, but not limited to, Boeing 747-100, 747-200, 747SR, 747SP, and DC10-40 series airplanes. AD requires revising engine manuals (P/N 646028, 770407, 770408) to establish a 15,000 cycles-since-new life limit for 6th stage low pressure turbine (LPT) air seals P/N 808846, 809171, 811260, and 811261, which may not have been life-tracked due to manual confusion.

Whether AD 2004-10-01 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.

How AD compliance is recorded

A valid compliance record (14 CFR 43.9) states:

Method of compliance — The specific action taken (inspected, replaced, modified) and to what revision.

Date — When the work was done.

Aircraft time — Total time in service / tach at compliance — how recurring next-due is computed.

Signature & certificate — The A&P/IA who returned it to service, with certificate number.

Is AD 2004-10-01 complied with on your aircraft?

Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.

Look up a tail number →Read the full directive (Federal Register)

Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.